<template>
	<view>
		<view class="goods-list">
			<view v-for="(goods, i) in goodsList" :key="i" @click="gotoDetail(goods)">
				<my-goods :goods="goods"></my-goods>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				// 请求参数对象
				queryObj: {
					// 查询关键词
					query: '',
					// 商品分类Id
					cid: '',
					// 页码值
					pagenum: 1,
					// 每页显示多少条数据
					pagesize: 10,
				},
				// 商品列表的数据
				goodsList: [],
				// 总数量，用来实现分页
				total: 0,
				// 默认的空图片
				defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png',
				// 是否正在请求数据
				isloading: false
			};
		},
		onLoad(options) {
			// console.log(options);
			this.queryObj.cid = options.cid || '';
			this.queryObj.query = options.query || "";
			// console.log(this.queryObj);
			this.getGoodsList();
		},
		methods: {
			async getGoodsList(cb) {
				this.isloading = true
				// 发起请求
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/goods/search', this.queryObj)
				this.isloading = false
				if (res.meta.status !== 200) return uni.$showMsg()
				// 只要数据请求完毕，就立即按需调用 cb 回调函数
				cb && cb()
				// 为数据赋值
				this.goodsList = [...this.goodsList, ...res.message.goods]
				this.total = res.message.total
			},
			// 触底的事件
			onReachBottom() {
				// 判断是否还有下一页数据
				if (this.queryObj.pagenum * this.queryObj.pagesize >= this.total) return uni.$showMsg('数据加载完毕！')
				// 判断是否正在请求其它数据，如果是，则不发起额外的请求
				if (this.isloading) return

				this.queryObj.pagenum += 1
				this.getGoodsList()
			},
			// 下拉刷新的事件
			onPullDownRefresh() {
				// 1. 重置关键数据
				this.queryObj.pagenum = 1
				this.total = 0
				this.isloading = false
				this.goodsList = []

				// 2. 重新发起请求
				this.getGoodsList(() => uni.stopPullDownRefresh())
			},
			// 点击跳转到商品详情页面
			gotoDetail(item) {
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
				})
			}
		}
	}
</script>

<style lang="scss">
	.goods-item {
		display: flex;
		padding: 10px 5px;
		border-bottom: 1px solid #f0f0f0;

		.goods-item-left {
			margin-right: 5px;

			.goods-pic {
				width: 100px;
				height: 100px;
				display: block;
			}
		}

		.goods-item-right {
			display: flex;
			flex-direction: column;
			justify-content: space-between;

			.goods-name {
				font-size: 13px;
			}

			.goods-price {
				font-size: 16px;
				color: #c00000;
			}
		}
	}
</style>
